Ship s ventilatob



'declare that the following is a full, clear, and

.with a circular opening, with four arms, or

uNirrEn 10E v TAIREN ROBINSON, OF NEW HAVEN,CONNECTIGUT.

SHIPS VENTILATOR.

Specification of Letters Patent No.

To all whom t may concern.' p

Be it known that I, WARREN ROBINSON, of the city of New Haven, in the county of New Haven and State of Connecticut, have invented a new and useful Improvement in Ventilatore for Ships, dsc.; and I ydo hereby exact description of the construction, char` acter, and operation of the same, reference being had to the accompanying drawings, which make a part of thisspecification, Vin which- Figure l, is a perspective view of the ventilator as it will appear when tted into the ships deck, or elsewhere, and open for ventilating. Fig. 2, is a plan view of the stationary part of the ventilator as seen from the lower side, showing the slots through which the pin passes, and the inclined planes on which the ends of the pins work to secure the movable part in its proper position, either open or closed. Fig. 3, is a plan view of the same as seen from the upper side, showing the same slots. Fig. 4, is a view of a section of Fig. l, cut through the line A, A, Fig. 3, showing the shaft, or spindle, as it passes through the hub, or nave, the two pins which serve to secure it in its proper position, and a part of one of the inclined planes.

My improvement consists in so constructing the ventilator that the movable part may be raised up to ventilate the ship by turning the top part, or cap, from right to left one fourth (or less) part of a turn and raising it vertically to the proper height, and again turning the top, or cap, from left to right, the same distance as before, when it will be firmly secured in that position, and will remain so until the cap is turned back, and so that by again turning the cap from right to left the movable part will, by its own weight, drop down vertically to the position of closing, when it may be iirmly secured in that position, water-tight, by means of the pin working on the inclined plane on the lower side or end of the hub, or nave, and not be liable to be moved, except by the hand, intentionally.

I make the ventilator of brass, bronze, or any other suitable metal, by casting it in two pieces, as represented, in section, B, C, Fig. 4, and also in Fig. l. I make the stationary part in a square, or any other shape,

spokes, a, a, a, a, and a hollow hub, or nave,

10,523, dated February 14, `ism. i

Z), in the center, all as shown inFigs. 2 and y3, and with a raised curb on the'upper side,

around the circular opening, as shown at c, in Fig. l and in section at '0, o, Fig. 4. Through this hub, or nave, b, I make two vertical slots, d and 0l, as seen in Figs. 2 andV 3, and on the under side of this hub, or nave, I make two inclined planes, as seen at e and e, Figs. 1, 2, and 4, on which the pins, f andv f', Fig.` 4, to secure the movable part, B, firmly in its position, either when open orv when' closed, one of which pins is seen at f, Fig. I. I make the movable part, B, with acap, or cover, as`v seen in Fig. l, some-k what larger than the circular curb, c, as in-V dicated by the dotted circle, g, gFig. 3, with the edge projecting downward, as represented in section at it, 71 in Fig.,4, so as to close the top water tight, and a shaft, or

spindle, as shown in section at f and ff', Y

Fig.Y 4, which passes downward through the J i vso that will serve the same purpose or produce c the same result. Having thus constructed the parts, I insert the pin, f, through the shaft, or spindle, f, f', and pass the spindle downward through the hub, b, and then insert the lower pin, f, below the hub, all as indicated in Fig. 4. The pin, f', must be long enough to extend beyond the extent of the slots, l and cl, so that the movable part may never be detached from the stationary partA by accident. Then by turningpthe cap, B, about one-fourth of a turn, f rom'left to right the pin ff, will be forced downward by the inclined plane, e and e, as seen at f', Fig. l, so as to press the cap, B, closely upon the upper edge of the collar, or curb, c, and

. close the ventilator water tight, and should it ever be deemed necessary there maybe a strip of india rubber, or any other kind of packing, fitted into the recess, h, Fig. 4, in the cap, B, to insure its perfect tightness.

The requisite number of these ventilators' are to be fitted into the deck of the ship, or Other vessel, in the usual way, when they i may, at any time, be opened for use by simply turning the cap, by hand, from right to 'left un the pm f, Fig. i, win pass up through t-he slots, CZ and d, Figs. 2 and 3, and then raise up the-cap, B, until the pin f, strikes the lower end of the hub, (which pin is too long to pass through the slots,) and then turn the cap, B, from left to right, when the pin, f', will be forced downward by the inclined planes, e and e, to the position seen at f, Fig. 1, and the pin f, having passed away from the slots, cl and will be pressed onto the upper end of the hub, b, and thus secure the movable part so firmly that no accident can change its position, and when it is desired to close the ventilator turn the cap, B, from right to left till the pin f, comes over the slots again, when the cap, B, will descend, by its own weight (the pin f passing through the slots, d and d) and rest on the upper edge of the curb, or collar, 0, and then by turningthe cap, B, from left to right the pin,ef, will be forced downward (as before described) by the inclined planes and press the cap` so closely upon the upper edge ot' the collar, c, as to close the ventilator water tight, and will hold it so firmly in that position that no accident can dist-urb it or cause it to leak even though und-er water. i

The advantages of my improvement consist, in part, in the simplicity of its struc-` ness and dispatch with which it may be` openedand closed, as either can be done in less time than would be required to give a single turn to a screw, and this might oftenY be of the greatest importance on ship-board` in the event lof a sudden Squall, gale, or storm, at which time the time of every `one on board is most precious, and inthe certainty of closing it watertight, it not being liable to error, as might be the case bythe binding of a screw.

I am aware that a patent was issued to Enoch Hidden, of New York, dated June 21, 1853, for side lights and ventilators for ships. I therefore do not claim any part, or process, or other matter claimed by l said Hidden in his said patent.

What I claim as my invention, and desire to secure by Letters Patent, is

The combination of the'movable part, B, with the two inclined planes (e and e) when the whole is constructed, arranged,

and combined, substantially as herein described. Y

WARREN ROBINSON. 

